from tracemalloc import start


article = 'python'


len = len(articl)

print(len)


for i in range(len):
    print(i,article{i})

    old = "o"
    new = "*"
    i = article.replace(old,new)
    print(i)

    #sub = '今'
    #start = 53
    #end = 107

    #print(i)

    #i = 'goodfeng'
    #sth = 'xxx'

#i.say(sth)